Ventilator



March l2, 1929. 4 E. A. RosELL.

VENTILATOR Filed Sept. l2, 1927 Eijz'odgasell img-m n mm ATTORNEY Patented Mar.y 12, 1.929.

UNITED! s'rAres ERIC A.' nosnLL, oF UPPER DARBY, PENNSYLVANIA.

VENTILATOR.

Application filed September 12, 1927. Serial No. 219,138'.A v

This invention relates torventilators, and

more particularly to a ventilator and case@y ment therefor which is built into a brick wall or analogous structures. The principal -object of the invention is to provide a. ventilator vand easement therefor with an automatic arrangement,whereby the door of thev ventilator may be openedl or closed by asuccessive downward pull on a depending cord or chain which is connected to the ventilator door. Another object of the invention is to. pro

vide a ventilator as specified, which is simple in construction, cheap to manufacture, readily operable at .all times,requires no auxiliary appliances for operation, and one ywhich is practical and effective for the purpose for which it is designed.

It is to be understood that the particular herein given are in no way limitive, and that while still keepingwithin the scope of the invention, any desired modification ofdetails and proportions may be made inthe. construction of the appliance according to zcircumstances. f

The invention comprises further features and lcombination of parts to be hereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1-is a vertical section through the ventilator as positioned in a wall.

Figure 2-is a section on the line 2-2 of p Figure 1.

larly disposed punched-out portions 15, whichA extend outwardly from said cover. The inner side 16 of the cover 13 is provided with a suitable facing of wire mesh or screening 17 for keeping out flies, etc. The inner end of the casing 10 is provided at its lower edge 18 with a suitable spring influenced hinge 19 to which the ventilator door is secured.

Suit-ably attached to the inner face of the door 2O in close proximity to the one side edge 22 of the door 20, is a clevis bracket 23 having pivotally connected thereto at 24, an arcuately formed member 25, which extends into the casing 10-and is provided' with an arcuate slot 26. y

This member 25 carries an arcuate plate 27, which is secured to 'the member 25 by the lheaded pins, 29 passing through spacing sleeves 30. By means of-thesesleeves the plate 27 is held .spaced to 'one side of the member 25, and carried by the plate 27 through the medium of headed pins 27a is an arcuate guide rack 25a. This guide rack 25u isv concentricwith the slot 26, and is so spaced in the slot 26 as to forni an endless arcuate path 31, in which a pin 32 isposi-` tioned. open posit-ion or toa vclosed position, the member k25 operates so that the pin 32 traverses the slot l26, the pinf32 guides about the guide rack 25a. One edge of the slot v26 has ratchet teeth 28, andrsincelthe member When the door20 is moved Ato anr 25 is pivotedat 24 to the bracket 23', the teeth 28 travel over the pin 32 as the door opensf The travel of the teeth is` step by step movement, so thatthe *door may open from one position to another. vAs the door opens from a lclosed position to its extreme open posias in Figure 1, thepin 32 engagesthe last tooth 28 adjacent the inner end of the slot 26.

The arcuate member 25 has an angular abutment edge 26a, which at times, engages with the base 23" of the bracket 23. "When it is desired to close the door 2O from the full line position in Figure 1 to the closed dotted line position, and as in full lines in Figure 2, the chain or cord 311a may be pulled. The angular abutment edge 26FL will engage with the base 23a of the bracket, thereby tending to. ward forcing the member 25 until the pointed end 25b of the rack 25L moves above the pin 32, allowing the beveled. edge 25C to cam over the pin 32, allowing the latter to traverse the lower part of the slot 31, while the door moves to a closed position. When the pin32 traverses the'lower part of the slot 31, the angular abutment edge 26a assumes a position out of engagement with the base 23a of the bracket 23, In this manner the door` operates from an open position to a closed roo position. Said guide rac-k a projects into 'i and is fixedly placed in the arcuate slot 26 by means ofthe plate 27, so that the pin 32 may guide through the endless path 31.

The pin 32 is secured-*to and carri-ed by one With the teeth 28. The pin 32 is adapted for engagement with the ratchet teeth 28 against y the spring influenced hinge upon the closing movement of the ventilator door to which the arcuate member 25 is attached, and by means of the'spring action of the hinge 19 the door Will close. When the door 20 reaches a closed position, the pin 32 will have engaged With the upper end portion of the'path 31, as shown in dotted lines in Figur-e l,v and when the door 20 is opened the arcuate member 25 Will move With it and the teeth will travel over the pin 32 until the pin 32 reaches the last ratchet tooth and then upon a further movement of the door the plate 25 Will position so that the pin 32 Willengage the lower end of the path V3l, or rather the arcuate plate 25 will move so that the curved or beveled edge 2'5c Will pass over the pin 32, so that the door may move to a closed position.

The bracket 23 is made from a single piece of metal bent upon itself to Lt'orm therbase 23a, the bent portions being disposed flat against the base 23a, and then projected to parallel spaced positions forming the ears,

between which the arcuate plate 25 is pirvoted on the headed ulcrum 24.

' vrFromthe foregoing it Will be noted there has been provided a ventilator Which may be opened and closed in a rapid effective manner.

The invention having been set forth, what is claimed is:

l. In a ventilator, the combination with a casing havingY a passage, of a closure to close one end of the passage, an arcuate plate pivotally and operatively mounted on the closure and provided with an arcuate continuous endless path, a pin projecting inwardly of the passage from the side thereof and positioned to engage Within the path, one edge of the path having ratchet teeth to operatively move over the pin step by step, so that the closure may assume ditferent open positions, and a guide rack positioned within the path to enable the pin to travel through the path. I

2. In a ventilator having a `casing lined passage with a grating at one end, a spring tensioned closure at the other end, an arcuate Y- endless path'as the closure moves to a closed- Y position. l j

In testimony whereof I allixmy signature.

ERIC A. ROSELT. 

